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- The nitrogen oxide, may inhale urban primary pollution sources and so on particles, many come from the automobile. 氮氧化物、可吸入颗粒物等城市主要污染源，许多来自汽车。
- The principal component analyses for the present pollution indexes in every estu-ary along Binghou coast in Bohai Sea were made.Thus the primary pollution indexes are given. 本文对渤海滨州沿岸各入海河口进行了现状污染指标的主组元分析，获得表征各河口的主要污染指标，进而说明各河口污染类型。
- Respirable particles from the most serious of which has become larger primary pollutants. 其中可吸入颗粒物最严重，已成为居室首要污染物。
- At first, the primary pollutants in the cyanide-containing wastewater are changed into NH3-N2, and, then,is nitrated in the biochemical treatment process. 含腈（氰）污水中主要污染物在生化处理过程中首先被转化为氨氮，然后进一步硝化。
- Pollutants can be added to the air directly (primary pollutants), or they can be created in the air (secondary pollutants) under the influence of solar radiation. 污染物可直接进入大气（初级污染物），或在太阳辐射的影响下于大气中产生（次级污染物）。
- The disease is still in its primary stage. 这疾病仍然在初发阶段。
- Primary Pollutant Discharge by Region 各地区主要污染物排放情况
- The little boy left primary school at eleven. 这个小男孩十一岁时小学毕业。
- Sure. We are friends since primary school. 当然，我们从小学就是朋友了。
- I started primary school when I was 5 years old. 我五岁时开始读小学。
- A primary cause of Tom's failure is his laziness. 懒惰是汤姆失败的主要原因之一。
- Primary school teachers use a lot of visual aids. 小学教师使用大量的视觉教具。
- Love and hatred are primary emotions. 爱和恨是基本的情感。
- The Democratic primary was held this month. 民主党候选人初选於本月举行。
- Primary education comes under the umbrella of local government. 小学教育受地方政府的保护。
- He only accepted the primary education off and on in his childhood. 他小时候只断断续续地接受过初等教育。
- Evaluation on Sediment Heavy Metal Pollution of Primary Pollution River Reach in Guangdong Province 广东省主要污染河段底质重金属污染评价
- The primary reason for advertising is to sell more goods. 做广告的根本目的是要多出售货物。
- Collins was nosed out by his opponent in the primary. 柯林斯在初选中就被他的对手击败了。
- Not derived from something else; primary or basic. 基本的不是从它物派生的; 原本的或基本的
